Symbolic Variables, Expressions, Functions, and Preferences

Symbolic Math Toolbox™ introduces a special data type —
symbolic objects. This data type includes symbolic numbers, symbolic
variables, symbolic expressions, and symbolic functions. It also includes
vectors, matrices, and multidimensional arrays of symbolic numbers,
variables, expressions, and functions. Using symbolic objects in computations
indicates that MATLAB® must perform these computations analytically
instead of numerically. Symbolic computations are exact and are not
prone to round-off errors. For a quick guide on creating symbolic
variables, expressions, and functions, see Create Symbolic Numbers, Variables, and Expressions and Create Symbolic Functions.